There is an additional complication in the computation of the charged-lepton
energy moments. They are computed by introducing the factor
\((p_\ell \cdot v)^i\)  in the integrand of the electron-neutrino loop, which
make them dependent on the parity-odd part of the amplitude. As a consequence
the traces which contain an odd number of \(\gamma _5\)  matrices does not cancel
anymore and we have to deal with traces involving \(\gamma _5\)  in \(d\)  dimension.
We adopt the so-called Larin prescription [1]} and substitute
\(\gamma ^\mu \gamma ^5 &\rightarrow &\frac{i}{3!} \, \varepsilon ^{\mu \nu \rho \sigma }\frac{\left(\gamma _{\nu }\gamma _\rho \gamma _{\sigma } -\gamma _{\sigma }\gamma _\rho \gamma _{\nu }\right)}{2}\, ,\) 
